The first time I visited Ben Thanh with my friend, she told Ben what # she would like and he replied, "no that's not for you, you get something different" and then proceeded to tell her what she should get instead.
So, of course, being vegetarian I asked him what I should get. "#59" was his reply. I checked out the description and told him that it looked very boring and like something I could get anywhere. He just shrugged and said, "you get #59".
I will never forget that experience. I have been more than a dozen times and I almost always get #59. Nothing beats the perfectly cooked tofu and sauce of this dish. Every time.
I have had other dishes and tasted the dishes of many many friends, all are good and very very fresh (without the gross after-taste/feeling of chinese stir-frys), but #59 will always be mine.
Be sure to try the iced coffee as well!